MySQL

Background: When we are doing data migration or splitting, when using tablespace transcation this solution, it is very likely that there will be a copy error from the library, reported: last_sql_errno:1146Then the specific error content may be as

MySQL the installation and configuration1. go to the official website to download the Mysql-5.6.29-winx64.zip package. Address:Http://dev.mysql.com/downloads/mysql/5.6.html2 , unpack the installation package to your designated directory, my

Perfect solution to the problem of storing garbled characters in Php+mysqlPreface: PHP and MySQL database Chinese character coding problems.1. mysql Database sideThe database encoding method is set uniformly to utf8_general_ci2, the encoding method

mysql timer is the system to provide an event, and the timer inside Oracle is the system to provide the job. Less nonsense, create table below: Creation table mytable (id int auto_increment not null,name varchar (+) NOT NULL default ", introduce

The requirement is this: Find out which shops are not sent to the task. So that the customer service to contact them, ask the situation.Each business can have n stores, each store can put n tasks, a task will generate N task orders, the member

1, decompression.  2. Add "D:\Program Files\mysql-5.7.11-winx64\bin" to the system environment variable.  3, modify the My-default.ini.   4 . Initialize the data directory and a data directory will appear under the installation directory. (Run as

/*Load data from TXT file*/LOADDATA LOCAL INFILE "D:/Data.txt " into TABLETname;/*Load. sql command File*/SOURCE D:/Mysql.sql;/*Change passowrd*/UPDATEMysql.User SETPassword=PASSWORD ('123456')WHERE User = 'Root';/*Show Current Database*/SELECT

1.MySQL generates SQL to delete tables that meet the criteria: 1 select CONCAT ( ' DROP TABLE ' 4 GROUP_CONCAT (table_name), 5 ‘;‘ 6 ) as statement 7 from 8 INFORMATION_SCHEMA. TABLES 9 where 10 table_schema = '

A random password was generated when the installation was completed when the mysql5.7 version was compiled in the previous days. Then, using the random password to log in to MySQL in order to change the password, the discovery hint:ERROR 1862 (HY000)

Keepalived Installationwgethttp://www.keepalived.org/software/keepalived-1.2.19.tar.gz Yum install gcc gcc-c++ pcre-devel zlib-devel openssl-devel-yYum–y Install Kernel-devel Kerne Kernel Development KitTAR-XF keepalived-1.2.19.tar.gzCP keepalived-1.

How to modify the MySQL Super Administrator root password under window1 Stop ServiceStart-and-run input cmd, open a command Prompt window, and then enter net Stopmysql to stop MySQL-related services2 in the Command Prompt window, go to the bin

------Create a database (slightly)---------------------Creating user mysql5.6 The user with insert is problematic ---------GRANTUSAGE on *.* to 'User01'@'localhost'Identified by '123456' with GRANT

Information_schema database is a MySQL self-brought, can be regarded as a database, the exact information database. It holds information about all the other databases maintained by the MySQL server. such as database name, database table, table

After modifying the Lower_case_table_names=1, the business has a library of the table can not open, looked at the table name was capitalized before, checked if the settings are not case-sensitive,The previous size table name is changed to lowercase.

Delete from where not inch (Selectmin from,select*from asGroup by t.id);Most of the online searches are as followsDelete frompeoplewherePeopleidinch(SelectPeopleid fromPeopleGroup byPeopleid having Count(Peopleid)> 1) androwID not

1, install mysql5.5 and 5.5 or more need to install CMake1) Download CMakewget--no-check-certificate http://www.cmake.org/files/v2.8/cmake-2.8.7.tar.gz2) Unzip the build installationInstall the packages that you depend on first:Yum-y Install gcc*Tar

MySQL Study Notes: QueryChapter 3 1. When we do not know what database names can be used? You can use the following command to View Details: `SHOW DATABASES；` The result is as follows: 2. When we know the databases that can be used, such as mysql,

Custom types in Hibernate-UserType and CompositeUserType I. UserType Hibernate has a custom ing table attribute mechanism. It mainly implements the interface UserType. The specific UserType: Import java. SQL. preparedStatement; import java. SQL.

Mysql index and Optimization Mysql index and optimization usage summary: In relational databases, the use of indexes is very important, and all relational databases support the indexing mechanism, because with indexes, the retrieval speed is very

Compile and install MySQL5.6.16 under LinuxCentOS6.5]I. Preparations before MySQL compilation and Installation Install the tools and libraries required for compiling source codeYum install gcc-c ++ ncurses-devel perl Install cmake, download the